Hello again , bought another tdi gal 54 plate auto (getting lazy ) but the heated screen dont seem to work , Switch lights up as should both by pressing and by heater panel engine revs drop slightly and alternator makes a sound when light is on but it doesn't clear . Have had a read in topics but not come across this , Also drivers mirror nothing works is this on a separate fuse to passengers . Wouldn't think I'd had a galaxy for five years other one must b a good en . Thank you